Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Dallas County, Alabama
EPA puts Dallas County in Zone 2, its middle radon zone, and only 6 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
17.1%
Autauga County
- Autauga
- 17.1%
1 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
17.1%
Autauga County, 31 miles
- Autauga
- 17.1%
- Alabama
- 21.9%
Share at 4+ pCi/L, 35 tests, 2008 to 2017
Ground above low
98.2%
33.6 pts above Alabama
- Dallas
- 98.2%
- Alabama
- 64.7%
Share of land USGS rates moderate or high potential
Tests reported
15
Too few for a share
- Dallas
- 15
- Needed
- 30
2005 to 2014, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Dallas County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Dallas County, At a glance
Dallas County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Dallas County is a
USGS geologic potential: Moderate across 98% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Dallas County, 2008 to 2017, laboratory
CDC holds 6 reported tests for Dallas County over the 2008 to 2017 laboratory totals, with a median of 0.5 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Dallas County beside the counties around it is how this page reads it.
What these figures count
Only 6 tests were reported to CDC for Dallas County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Dallas County, Compared
Dallas County radon figures, compared
Calculated by Radon411CDC's largest figure for Dallas County rests on 15 tests over the 2005 to 2014 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 1.4 pCi/L, with a middle value of 0.5 pCi/L.
Autauga County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 17.1% of its tests at or above 4 pCi/L. Farther out, Montgomery County (53 miles away) at 9.7%, Elmore County (59 miles away) at 22.2% and Shelby County (70 miles away) at 11.3% have figures too. Pooled across 65 Alabama counties, 21.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Colbert County reported the highest share (36.2%) and Baldwin County the lowest (0.0%). EPA's 1993 map puts Dallas County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 98% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Dallas County, Geology
The ground under Dallas County
PredictedMost of the ground under Dallas County is one class on USGS's geologic map: 98.2% of its land is moderate radon potential, with 1.8% low. 98.2% of it lies in the area the map calls Inner Coastal Plain, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Coastal Plain | Marly sandy clay, chalk, and glauconitic sands. | Moderate | 10 | 98.2% |
| Coastal Plain | Marly sandy clay, chalk, and glauconitic sands. | Low | 7 | 1.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dallas County beside the ground around it
Across Alabama 14.3% of the land is rated high; none of Dallas County's is. Of the 6 counties that border it, 1 has more high-potential ground, Chilton County the most at 36.7%.
The map rates the ground, not the air in any home.
Local help
Dallas County, Local resources
Radon testing and mitigation in Dallas County
- Alabama Radon ProgramAlabama Radon Program, run by Alabama Department of Public Health, answers questions about testing, mitigation and the rules in Alabama.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Alabama directoryNo professionals are listed in Alabama yet. The state program can point you to registered testers and mitigators.
What Alabama's program says
- Phone
- (334) 290-6244
What it means
Dallas County, Questions
Questions about radon in Dallas County
Are radon levels high in Dallas County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Dallas County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 pCi/L. Autauga County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 17.1% of its tests at or above 4 pCi/L.
Which counties border Dallas County?
Dallas County borders 6 counties: Perry County, Wilcox County, Autauga County, Lowndes County, Marengo County and Chilton County.
Products
Dallas County, Products
Testing a home in Dallas County
No CDC figure names Dallas County; the nearest county with one, Autauga County (31 miles away), reported 17.1% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Dallas County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorX-Sense
XR0A-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Dallas County, Bordering counties
Counties bordering Dallas County
Calculated by Radon411- Radon levels in Marengo CountyEPA zone 3
50.0%at or above 4 pCi/L
Median 9.3 pCi/L · 2 tests
- Radon levels in Autauga CountyEPA zone 2
17.1%at or above 4 pCi/L
Median 0.9 pCi/L · 35 tests
- Radon levels in Chilton CountyEPA zone 2
11.1%at or above 4 pCi/L
Median 1.1 pCi/L · 18 tests
- Radon levels in Perry CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 3.2 pCi/L · 1 test
- Radon levels in Lowndes CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 2 tests
- Radon levels in Wilcox CountyEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Dallas County, Cities and towns
Cities and towns in Dallas County
Dallas County has been losing residents: from 38,176 in 2020 to 35,140 on July 1, 2025, a fall of 8.0% by the Census Bureau's estimates. That works out to 36 people per square mile of land. Its largest town, Selma, has 16,077 residents, 45.8% of the total. Together its 3 incorporated places hold 57.3% of those residents; the other 42.7% live outside any of them. Reported testing is thin here: 15 tests over 2005 to 2014, or 0.4 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.7.
From Selma to Orrville, CDC publishes no figure by town: each reads Dallas County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Selma | 16,077 | −9.8% | 45.8% |
| Valley Grande | 3,903 | −6.5% | 11.1% |
| Orrville | 140 | −7.9% | 0.4% |
3 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Dallas County, Homes
Homes in Dallas County
Of Dallas County's 18,949 homes, 60% are detached houses, against 69% across Alabama; 18% are mobile homes. The homes are older than Alabama's as a whole: half were built before 1975 (1985 for Alabama), and 24% date from before 1960. 61% of occupied homes are lived in by their owner (Alabama: 70%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Dallas County | Alabama |
|---|---|---|
| Housing units | 18,949 | 2,316,192 |
| Detached houses | 60% | 69% |
| In buildings of 5 or more | 5% | 12% |
| Mobile homes | 18% | 13% |
| Built before 1960 | 24% | 16% |
| Built since 2000 | 16% | 27% |
| Middle year built | 1975 | 1985 |
| Owner-occupied | 61% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.